These instructions detail how to add VTEC circuitry to a non-VTEC '1980' style ECU board. Note that the ECU must also run a VTEC programmed chip or ROM for VTEC operation (the stock program won't operate VTEC).

** full write-up to come at a later date. **

SI5151S high side switch - install at IC14
D4001 diode - install at D11 (Be sure grey striped side matches marking on board)
O ohm resistor (brown with black stripe) - install at J10(polarity doesn't matter)
black NPN transistor labeled D1423 - install at Q26 (writing faces you/front of ECU)
10k resistor (brown, black, orange, gold stripes) - install at R142 (polarity doesn't matter)
51k resistor (gold, orange, brown, green stripes) - install at R143 (polarity doesn't matter)
12k resistor (brown, red, orange, gold stripes) - install at R144 (polarity doesn't matter)